Unidentified Mexican travelers who have been held in quarantine at a hotel, are checked by Chinese inspectors after they arrived to a special entrance at Shanghia's Pudong International Airport. (AP Photo/Eugene Hoshiko)

(Newser)
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Two American citizens have been placed under quarantine in mainland China over swine flu fears, CBS News reports. Another two have been held and released, according to a US Embassy spokeswoman who said the Americans were detained either because they showed flu-like symptoms or were close to "cases of interest to the Chinese authorities."

China has also quarantined 29 Canadians and 71 Mexicans. A plane sent by the Mexican government—which complains its citizens, including a diplomat, have been unfairly singled out—arrived in China today to take them home. "There are soldiers who won't let us go past the gate," said one Mexican woman being held in a Beijing hotel. "This is like a kidnapping for us."